December weather forecast
Fort Atkinson, IA

Weather in December

December, the first month of the winter in Fort Atkinson, is also a subzero cold month, with an average temperature fluctuating between 18.3°F (-7.6°C) and 28.4°F (-2°C).

Temperature

In December, the average high-temperature drops from a cold 41.9°F (5.5°C) in November to a freezing cold 28.4°F (-2°C). In Fort Atkinson, the average low-temperature is 18.3°F (-7.6°C).

Humidity

In Fort Atkinson, Iowa, the average relative humidity in December is 86%.

Rainfall

In Fort Atkinson, in December, it is raining for 6.4 days, with typically 1.65" (42mm) of accumulated precipitation. In Fort Atkinson, during the entire year, the rain falls for 149 days and collects up to 30.59" (777mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Fort Atkinson. In Fort Atkinson, during 13.1 snowfall days, 4.57" (116mm) of snow is typically accumulated. Throughout the year, there are 60.9 snowfall days, and 24.37" (619mm) of snow is accumulated.

Daylight

With an average of 9h and 3min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 7:19 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:42 pm CST.

Sunshine

In December, the average sunshine in Fort Atkinson, Iowa, is 3.9h.

UV index

January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 1 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the average humidity in December in Fort Atkinson?

In December, the average relative humidity is 86%.

How much does it rain in Fort Atkinson in December?

In December, in Fort Atkinson, the rain falls for 6.4 days. Throughout December, 1.65" (42mm) of precipitation is accumulated.

How many days does it snow in December in Fort Atkinson?

In December, in Fort Atkinson, it is snowing for 13.1 days. Throughout December, 4.57" (116mm) of snow is accumulated.

What is the month with the shortest days in Fort Atkinson?

December has the shortest days of the year, with an average of 9h and 3min of daylight.

What is the average length of the day in December in Fort Atkinson?

In December, the average day length is 9h and 3min.

When is the sunrise / sunset in December in Fort Atkinson?

On the first day of December, sunrise is at 7:19 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 4:42 pm CST.

How many hours of sunshine does Fort Atkinson have in December?

In Fort Atkinson, Iowa, the average sunshine duration in December is 3.9h.

When is the lowest UV index in Fort Atkinson?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 1.

What is the UV index reading in December in Fort Atkinson?

The average daily maximum UV index in December in Fort Atkinson, Iowa, is 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Fort Atkinson, IA

Average temperature in December - Fort Atkinson, IA
  • Average high temperature in December: 28.4°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.3°F).

  • Average low temperature in December: 18.3°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).

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Average pressure in December
Fort Atkinson, IA

Average pressure in December - Fort Atkinson, IA
  • Average pressure in December: 30.1"Hg

The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in December
Fort Atkinson, IA

Average wind speed in December - Fort Atkinson, IA
  • Average wind speed in December: 9.7mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).

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Average humidity in December
Fort Atkinson, IA

Average humidity in December - Fort Atkinson, IA
  • Average humidity in December: 86%

The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is October (76%).

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Average rainfall in December
Fort Atkinson, IA

Average rainfall in December - Fort Atkinson, IA
  • Average rainfall in December: 1.65"

The wettest month (with the highest rainfall) is June (5.04").
The driest month (with the least rainfall) is January (1.1").

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Average rainfall days in December
Fort Atkinson, IA

Average rainfall days in December - Fort Atkinson, IA
  • Average rainfall days in December: 6.4 days

The months with the highest number of rainy days are May and June (20.3 days).
The month with the least rainy days is February (4.4 days).

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Average snowfall in December
Fort Atkinson, IA

Average snowfall in December - Fort Atkinson, IA
  • Average snowfall in December: 4.57"

The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Fort Atkinson, IA

Average snowfall days in December - Fort Atkinson, IA
  • Average snowfall days in December: 13.1 days

The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Fort Atkinson, IA

Average daylight in December / Average sunshine in December - Fort Atkinson, IA
  • Average daylight in December: 9h and 3min

The month with the longest days is June (Average daylight: 15h and 19min).
The month with the shortest days is December (Average daylight: 9h and 3min).

  • Average sunshine in December: 3h and 54min

The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

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Average sunshine days in December
Fort Atkinson, IA

Average sunshine days in December - Fort Atkinson, IA
  • Average sunshine days in December: 14.5 days

The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.1 days).

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Average UV index in December
Fort Atkinson, IA

Average UV index in December - Fort Atkinson, IA
  • Average UV index in December: 1

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).

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Average cloud cover in December
Fort Atkinson, IA

Average cloud cover in December - Fort Atkinson, IA
  • Average cloud cover in December: 60

The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in December
Fort Atkinson, IA

Average visibility in December - Fort Atkinson, IA
  • Average visibility in December: 5mi

The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).

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